An N95 FFR is a type of respirator which removes particles from the air that are breathed through it.
These respirators filter out at least 95% of very small (0.3) microns) particles.
N95 are capable of filtering out all types of bacterai and viruses.
elastic bands hold the mask in place whilst you are wearing it.
How long can i wear this mask:
This mask can be used until it no longer fits snuggly to the face. to prolong it's life carefully remove after each wear and store in a zip lock bag after spraying with a 70% ethanol solution. If cared for these will last. These are obviously the more expensive option 1st off but if cared for can be cheaper than using a large amount of disposables. Also helps reduce the amount of landfill.